Vampiloid

Vampiloid, is a play on words. This is a special type of fanloids, with two features of voice, due to the fact that vampiloid has two forms (there is an exception when one form): human and vampire. The name itself has a combination of two words: "Vampire" and "Vocaloid"

Vampiloid on Fanloid Wiki

 * Zetsune Oto, a first male Vampiloid. His voice is gentle, adapted to melodic songs. Divided into two types: “Zetsune” and “Hagane”. Zetsune is the original voice often used. Hagane is a second form of voice, more hoarse and metallic, never used, intended for the Heavy Metal genre.
 * Akiyama Kero, a second male Vampiloid. His voice is not divided into vampire and normal. But he also has two forms.
 * Subaru Ogawa, the third male Vampiloid. He was forced to choose Kero as a victim, turning Kero into a vampire.